I think this thread was kinda left dangling and I don’t know if it ever really got resolved. I think microcivs are possible.
Issues:
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So, how do you forge?
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- You forge. Yeah, a tiny forge would suck, but ants and especially their cousins termites and bees make structures MUCH larger than themselves. A termite mound made of clay that had a fire lit in it could resemble a simple iron-smelting operation, and the results could be dragged into another hot forge, where they could be shaved into iron flakes for use as ant scale tools by some other large structure, say obsidian blades and a gravity powered hammer or something. Why would they do this? because they’re smart and were using such structures for something like cooking whole corpses of large animals anyways. A stone age termite supercity could kill elephants.
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Yeah, how do you fit that many neurons in their heads? I don’t think they could be smart.
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- You might not be able to. The human brain has 86 billion neurons or something insane like that, and it clearly weighs a few pounds. There’s no “quick trick you divide your brain size in half without loosing functionality” and even if there were you’d need more than a few such tricks to get the brain to the size of an ant, let alone and ant’s head. But, uh, yeah. Such tricks to exist. I shall list them
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- Megaphragma mymaripenne is a species of wasp that is the size of a single cell organism (and not an ostrich egg, if you’re worried about giant wasps). It has only a few thousand neurons, but that still seems like a lot for it’s size. It manages this by removing all the nuclei from it’s brain. This halfs the size, in one step. I mean. Nice! We can’t remove much else though, so unless we can achieve sapience with a reduced number of neurons, that isn’t enough.
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- Human brains are actually total overkill. You even seen that one CGP Grey vid about cutting your brain in half (“you are two” i think)? Yeah, you only need half a brain to display human level intelligence. You can’t recognize faces, but a feature reduction is expected when you half the number of required neurons.
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- Yeah, which of these features do we need? Humans have fantastic vision, and we are highly adapted to throwing things. Who needs either! Ants have tiny compound eyes, and simple weak arms (irl only legs but), throwing is a useless skill. About half the cortex is for vision, and the cortex is about 40% of the brain by volume. Half the size of it to drop color and a lot of complex abilities for a 20% size reduction. Most of the left side of your cerebellum is for talking, and do we really need learned language? Ants do well with pheromones and simple communication, one quarter of the size should cover that, and upgrade it a bit for abstract ideas, though this is a bit iffy. The cerebellum is 10% of the brain by volume, so that isn’t a huge gain. But… it has the most cells ??
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- YEP! 10% of the brain has most of the neurons! The brain doesn’t take advantage of the size advantage of granule cells, which have itty bitty cell bodies. They do need to be attached to large Purkinje cells but a few hundred thousand can share one, and we can take the nucleus out of them and the Cerebellum has that anyways. Neuroscientists and psychologists and whatnot: SHOOT THIS DOWN I AM 110% SAYING NONSENSE this will almost certainly not work, I however, don’t know why not! If the rest of the brain had the density of the cerebellum it would be at least a tenth the size, add that to a cerebellum reduced in size by 75% by the last step and we cut the whole brain to 11.5% the size over two steps.
11.5%, divided by two twice by the first two steps equals 0.375%.
- YEP! 10% of the brain has most of the neurons! The brain doesn’t take advantage of the size advantage of granule cells, which have itty bitty cell bodies. They do need to be attached to large Purkinje cells but a few hundred thousand can share one, and we can take the nucleus out of them and the Cerebellum has that anyways. Neuroscientists and psychologists and whatnot: SHOOT THIS DOWN I AM 110% SAYING NONSENSE this will almost certainly not work, I however, don’t know why not! If the rest of the brain had the density of the cerebellum it would be at least a tenth the size, add that to a cerebellum reduced in size by 75% by the last step and we cut the whole brain to 11.5% the size over two steps.
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- If we use the 1130 cm^3 average for women (was going to use Einstein but couldn’t find it), we get 4.2375 milliliters, or a fifth of a cubic inch. This is way larger than a small worker ant, but could easily fit inside a termite queen, not even needing the 4 inch/about 10 cm ones. I can’t find data on the volume of a warrior termite but I suspect a large one could fit this brain. Well, you know what they say about units. Playing with them is fun! I love the idea of simplifying mpg to mm^2, so I’ll get my own volume data from mass data and approximating density, because termites can barely float. That tells us they can’t be denser than water, so I’ll be conservative and assume water. A warrior of the larger species is 0.12 milliliters. (source for mass) Yeah that doesn’t work.
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- Okay. New idea. You know how people get confused and think the queen bees/ants/termites rule the colony? I know it doesn’t work like that, but why not! A moderately sized queen termite could forgo all senses and motor skills but add back in language centers to get the same brain size, and ordinary, tiny, termite/ants could just be pointed where they want. A supercolony can have many queens, and especially if the queens regularly talked to one another to get social intelligence, a colony could get hundreds of queens smaller than a slug or big spider, and form a huge super city with millions of workers and warriors.
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You likely think that sounds dumb, but you might also think you can’t go to space in tiny rockets. Well, you really shouldn’t. It’s a terrible idea.
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- However! Why make tiny rockets? Make big ones! Creatures like this would be accustomed to making megastructures, and with good communication, they might not need to risk a single brainy queen life, if they can boss the workers around with radio. And if you want big brains onboard for like, a mars mission, do it!